Screen unresponsive from time to time, what could the issue be?

So I dropped my iphone and it was badly cracken so I had to replace the screen wich I did. Now on the right side if the screen the touchscreen is unresponsive from time to time. I do have a glass protector screen on wich might be the case but I don't think so. I also had a white line in my screen for a couple of seconds and I could screenshot it, does that mean there is something broken inside?

Welcome to iMore! Did you have an Apple Store replace the screen or somebody else? It's possible that you got a bad display. Is the work warrantied? You might want to try restoring through iTunes to weed out a software issue but there's no guarantee.